1242202415 has 4 divisors (see below), whose sum is σ = 1490642904. Its totient is φ = 993761928.

The previous prime is 1242202397. The next prime is 1242202417. The reversal of 1242202415 is 5142022421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242202415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242202417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124220237 + ... + 124220246.

It is an arithmetic number, because the mean of its divisors is an integer number (372660726).

Almost surely, 2^1242202415 is an apocalyptic number.

1242202415 is a deficient number, since it is larger than the sum of its proper divisors (248440489).

1242202415 is an equidigital number, since it uses as much as digits as its factorization.

1242202415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248440488.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1242202415 is about 35244.8920412590. The cubic root of 1242202415 is about 1074.9727528699.

Adding to 1242202415 its reverse (5142022421), we get a palindrome (6384224836).

The spelling of 1242202415 in words is "one billion, two hundred forty-two million, two hundred two thousand, four hundred fifteen".